This is probably going to open up a huge can of worms, but what is the purpose/advantage of a huge bustle?

What's the bustle?

ever seen the the wing on a pro stock car? aerodynamics, at 150 mph the air moving over the boat is very important.

A. Cool factor
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B. Ladder stowage
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C. It gives the girls some place to dance besides your upholstery
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Image courtesy Naples Images.

not to mention it makes the boat look 10 feet longer.

You can count it in the OAL

im guessing it works like a cowl induction hood, and provides some stern lift.

Great question I bet a lot of members would also love to know.

Some good reasons already posted

Also a nice way to extend past the sharp props........nicer looking modern "molded in swim deck"

It`s the beak of the new generation

It's all about air. As mentioned above at high speeds, over 150, you can get a drag on the boat by dirty air behind it.